IL109146A - Enhanced tunability for low-dielectric-constant ferroelectric materials - Google Patents

Enhanced tunability for low-dielectric-constant ferroelectric materials

Info

Publication number
IL109146A
IL109146A IL109146A IL10914694A IL109146A IL 109146 A IL109146 A IL 109146A IL 109146 A IL109146 A IL 109146A IL 10914694 A IL10914694 A IL 10914694A IL 109146 A IL109146 A IL 109146A
Authority
IL
Israel
Prior art keywords
structures
dielectric
tunability
ferroelectric material
low
Prior art date
Application number
IL109146A
Original Assignee
Hughes Aircraft Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hughes Aircraft Co filed Critical Hughes Aircraft Co
Publication of IL109146A publication Critical patent/IL109146A/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/18—Phase-shifters
    • H01P1/181—Phase-shifters using ferroelectric devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/44—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element

Landscapes

  • Inorganic Insulating Materials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

A method of altering properties in a ferroelectric material having a dielectric constant Er, a loss tangent tan and a tunability at a given frequency f, comprising reducing said dielectric constant and said loss tangent while preserving a substantial fraction of said tunability by providing structures of said ferroelectric material, said structures oriented such that at least one dimension of said structures is parallel to a direction of applied dc bias field, said structures also having a critical dimension d in a direction orthogonal to said direction of applied dc bias field and parallel to the direction of propagation of an RF field at a frequency f that is given by the equation d m c 100f Er where c is ths velocity of light taken equal to 299.793 kilometers/second; wherein said method comprises embedding a plurality of columns of ferroelectric material in a matrix of an inert dielectric material, said columns having a cross- sectional dimension equal to or less than said critical dimension.
IL109146A 1993-04-01 1994-03-28 Enhanced tunability for low-dielectric-constant ferroelectric materials IL109146A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/045,333 US5607631A (en) 1993-04-01 1993-04-01 Enhanced tunability for low-dielectric-constant ferroelectric materials

Publications (1)

Publication Number Publication Date
IL109146A true IL109146A (en) 1997-06-10

Family

ID=21937275

Family Applications (1)

Application Number Title Priority Date Filing Date
IL109146A IL109146A (en) 1993-04-01 1994-03-28 Enhanced tunability for low-dielectric-constant ferroelectric materials

Country Status (9)

Country Link
US (1) US5607631A (en)
EP (1) EP0618640B1 (en)
JP (1) JP2638747B2 (en)
KR (1) KR0121437B1 (en)
AU (1) AU658090B2 (en)
CA (1) CA2120282A1 (en)
DE (1) DE69405899T2 (en)
ES (1) ES2107070T3 (en)
IL (1) IL109146A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996029725A1 (en) * 1995-03-21 1996-09-26 Northern Telecom Limited Ferroelectric dielectric for integrated circuit applications at microwave frequencies
US6146905A (en) * 1996-12-12 2000-11-14 Nortell Networks Limited Ferroelectric dielectric for integrated circuit applications at microwave frequencies
EP1135827A1 (en) 1998-10-16 2001-09-26 Paratek Microwave, Inc. Voltage tunable laminated dielectric materials for microwave applications
US6215644B1 (en) 1999-09-09 2001-04-10 Jds Uniphase Inc. High frequency tunable capacitors
US6496351B2 (en) 1999-12-15 2002-12-17 Jds Uniphase Inc. MEMS device members having portions that contact a substrate and associated methods of operating
US6229684B1 (en) 1999-12-15 2001-05-08 Jds Uniphase Inc. Variable capacitor and associated fabrication method
US6593833B2 (en) 2001-04-04 2003-07-15 Mcnc Tunable microwave components utilizing ferroelectric and ferromagnetic composite dielectrics and methods for making same
US6421021B1 (en) 2001-04-17 2002-07-16 Raytheon Company Active array lens antenna using CTS space feed for reduced antenna depth
CN2514852Y (en) * 2002-01-15 2002-10-09 郑继兵 Space field effect physiotherapy instrument
US6649281B2 (en) * 2002-03-27 2003-11-18 Raytheon Company Voltage variable metal/dielectric composite structure
US7051824B1 (en) 2003-11-03 2006-05-30 Accessible Technologies, Inc. Supercharged motorcycle
FR2980040B1 (en) * 2011-09-14 2016-02-05 Commissariat Energie Atomique ORGANIC FIELD EFFECT TRANSISTOR
US20150027132A1 (en) * 2013-07-23 2015-01-29 Qiming Zhang Cooling device including an electrocaloric composite
US11095042B1 (en) * 2020-02-13 2021-08-17 The Boeing Company Periodic tapered structure
CN114447544B (en) * 2020-10-30 2023-06-30 京东方科技集团股份有限公司 Phase shifter and antenna device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2959784A (en) * 1959-08-14 1960-11-08 Bell Telephone Labor Inc Scanning antenna system
US3069973A (en) * 1959-12-14 1962-12-25 Ibm Electro-optic light switch
JPS53110133A (en) * 1977-03-07 1978-09-26 Tdk Electronics Co Ltd Porcelain heating element made from positive characteristic semiconductor
DE2905905A1 (en) * 1978-02-22 1979-08-23 Tdk Electronics Co Ltd COMB-SHAPED HEATING ELEMENT
SU1084917A1 (en) * 1982-03-17 1984-04-07 Вильнюсский Ордена Трудового Красного Знамени И Ордена Дружбы Народов Государственный Университет Им.В.Капсукаса Microwave power limiter
US4706094A (en) 1985-05-03 1987-11-10 United Technologies Corporation Electro-optic beam scanner
EP0279873B1 (en) * 1987-02-21 1992-10-21 ANT Nachrichtentechnik GmbH Phase-shifter
JPH0272014U (en) * 1988-11-21 1990-06-01
US4870539A (en) * 1989-01-17 1989-09-26 International Business Machines Corporation Doped titanate glass-ceramic for grain boundary barrier layer capacitors
JPH0514044A (en) * 1990-06-04 1993-01-22 Nippon Telegr & Teleph Corp <Ntt> Microstrip antenna and case with microstrip antenna

Also Published As

Publication number Publication date
JP2638747B2 (en) 1997-08-06
DE69405899D1 (en) 1997-11-06
DE69405899T2 (en) 1998-05-28
AU658090B2 (en) 1995-03-30
EP0618640B1 (en) 1997-10-01
ES2107070T3 (en) 1997-11-16
AU5924294A (en) 1994-10-27
US5607631A (en) 1997-03-04
EP0618640A1 (en) 1994-10-05
KR0121437B1 (en) 1997-11-19
CA2120282A1 (en) 1994-10-02
JPH0746024A (en) 1995-02-14

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